InSAR Calibration and Validation by GPS Station

[Mostafa Heidari]

Hello dear friends

In our study area, we have 2 CGPS stations, one has complete daily data and the other has some gaps.

Is the following method correct? What method do you suggest?

As you know, in the displacement time series, the reference point is 0 (no displacement) at all times. I want to set the location of the full-data GPS station (GPS 1) as reference point and then calibrate the whole displacement time series by this station. finally, validate the new displacement time series by the other station (GPS 2). Is this method correct?

[Zhang Yunjun]

Hi Mostafa,

What you described sounds reasonable to me. For validation purpose, I would extract the InSAR result at the two GNSS sites, and compare, without playing with the entire InSAR 3D matrix. You may this post also relevant (https://groups.google.com/g/mintpy/c/gDUoLOwqy7c/m/PZkPatsUDQAJ).

If you still would like to tie InSAR to GNSS, which is still an active area of research, check more recent papers from Scripps and COMET groups would be helpful too..

I hope this helps,

Yunjun

[Mostafa Heidari]

Thank you dear Zhang Yunjun,

It was a great help.